GPS Power Status widget

I have developed a little widget that works like the bluetooth widget to show the power status of the GPS.

This uses Bangle.isGPSOn() which is in the leading edge formware v2.08.167
I wont check in until that firmware is generally available.

One thing I have found is that when I switch to a multiclock face that switches the GPS On; the widget does not repond and display the status until the LCD has powered off, or I change to a different clock face. To get round this I am poking the widget using.

        // poke the gps widget indicator to change
        if (WIDGETS.gps !== undefined) {
          WIDGETS.gps.draw();
        }

Code of widget below:

(function(){
  var img = E.toArrayBuffer(atob("GBiBAAAAAAAAAAAAAA//8B//+BgYGBgYGBgYGBgYGBgYGBgYGB//+B//+BgYGBgYGBgYGBgYGBgYGBgYGB//+A//8AAAAAAAAAAAAA=="));
  
  function draw() {
    g.reset();
    if (Bangle.isGPSOn()) {
      g.setColor(1,0.8,0);     // on = amber
    } else {
      g.setColor(0.3,0.3,0.3); // off = grey
    }
    g.drawImage(img, 10+this.x, 2+this.y);
  }

  var timerInterval;
  Bangle.on('lcdPower', function(on) {
    if (on) {
      WIDGETS.gps.draw();
      if (!timerInterval) timerInterval = setInterval(()=>WIDGETS["gps"].draw(), 2000);
    } else {
      if (timerInterval) {
        clearInterval(timerInterval);
        timerInterval = undefined;
      }
    }
  });

  WIDGETS.gps={area:"tr",width:24,draw:draw};
})();

1 Attachment

Great! Yes, I'd say that looks good.

I guess what might be happening is the widget gets Bangle.on('lcdPower' called before the multiclock face is called, so it's not turned on then. You could add a little delay to it?

Bangle.on('lcdPower', function(on) {
    if (on) {
      setTimeout(function() { WIDGETS.gps.draw(); }, 100); // <-- here
      if (!timerInterval) timerInterval = setInterval(()=>WIDGETS["gps"].draw(), 2000);
    } else {
      if (timerInterval) {
        clearInterval(timerInterval);
        timerInterval = undefined;
      }
    }
  });

or you could just overwrite the function when the widget is loaded so you respond immediately:

Bangle._setGPSPower = Bangle.setGPSPower;
Bangle.setGPSPower = function(on,appid) {
  Bangle._setGPSPower(op,appid);
  WIDGETS["gps"].draw();
};

Now that I have checked the GPSsetup app in, I am wondering if I should check widgps in OR wait until 2.09 comes out that supports isGPSOn() ?

I'd check widgps in - maybe with a comment in the description and if (Bangle.isGPSOn) return check at the top just to ensure it doesn't crash on old firmwares. We can always add the Bangle.on('GPS',_=>setGPSisOn) code to make it work on older firmware